The Legends Go Time Traveling With Flash, Arrow & Supergirl!

Are you ready for the final episode of the Arrow-Flash-Supergirl-Legends crossover? Because it airs TONIGHT!

In the fourth episode of the epic crossover, the Legends team must work together with The Flash (Grant Gustin), Supergirl (Melissa Benoist) and Green Arrow (Stephen Amell) to kill The Dominators once and for all.

Meanwhile, Stein figures out, with the help of others, how the team can terminate the Dominators, but is distracted by the aberration he realizes he created in 1987.

Check out a behind-the-scenes look below and tune in TONIGHT, Thursday, December 1st @ 8PM ET/PT on the CW to watch!